1. Electricity and magnetism are branches of physics that deal with charges in motion and observations relating to electricity and magnetism respectively.
2. A magnet is a body that attracts small pieces of iron and points toward the north-south direction when suspended freely. It has a north pole and a south pole. Like poles repel each other, while unlike poles attract.
3. Electromagnetism is produced when an electric current passes through a coil surrounding a magnetic material like iron. Electromagnets have many applications and their strength depends on factors like the current and number of turns in the coil.
1. Magnets can be natural or artificial. Natural magnets are made of the mineral magnetite while artificial magnets are usually made of steel or iron alloys.
2. All magnets have two poles - a North pole and a South pole. The magnetic force is strongest at these poles. A basic law of magnetism is that like poles repel each other while unlike poles attract.
3. Electromagnets are magnets that are temporarily magnetized by running an electric current through a coil of wire wrapped around an iron core. They are used in many electrical devices such as electric bells, telephones, loudspeakers, and industrial lifting magnets.
This document provides information about magnetism and electromagnetism. It discusses the poles of magnets, magnetic materials like iron, induced magnetism through magnetic induction, and how electromagnets can be created using coils of wire and electric current. Examples of applications that use electromagnets are also described, such as electric bells and circuit breakers. Magnetic fields and field lines are explained, including how they are produced by currents and plotted using compasses.
Magnets have north and south poles and magnetic fields that emerge from the north pole and return through the south pole. Molecular theory states that magnetism arises from electron orbits within molecules acting as tiny molecular magnets that are aligned in magnetized materials. An electric current flowing through a wire produces a circular magnetic field around it according to the right-hand rule. A coil of wire with current induces a magnetic field within it with field lines parallel to its axis. Electromagnets use this principle, with a solenoid wrapped around an iron core that becomes magnetized when current flows through the coil.
Magnets have north and south poles and magnetic fields created by electron arrangement. Molecular theory explains magnetism at the atomic level, with molecular magnets aligning in materials. Electric currents create magnetic fields, demonstrated by patterns with iron filings. Electromagnets are coils that can be magnetized and demagnetized by switching current on and off. Moving coil meters like the milliammeter measure current through magnetic interactions between the coil and a permanent magnet.
1. When an electric current passes through a conductor, it produces a magnetic field around the conductor.
2. An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current through a coil. The strength of the magnetic field can be increased by using an iron core inside the coil.
3. Electric bells use an electromagnet with a soft iron core. When the button is pressed, current flows through the electromagnet's coil, magnetizing the core and attracting an armature which strikes a bell to produce sound. Releasing the button stops current flow and resets the system.
The document discusses various topics related to magnetism including:
- The ancient discovery of magnetism in lodestone by the Chinese in 2000 BC who used it for navigation.
- The properties of magnets including having magnetic fields with poles that attract or repel other magnets and magnetic materials.
- Induced magnetism caused by an external magnetic influence.
- Differences between magnetic, non-magnetic, and magnetized materials and how to test for magnetism.
- Electrical and physical methods of magnetization and demagnetization.
- Plotting magnetic field lines using a compass to map field patterns.
Het this is Vedika Agrawal
the topic covers magnetism keeping in mind students of physiotherapy for there subject elecrotherapy.
Well it covers magnet of class 10th and 12th and also college level to some extent.
the ppt includes diagrams for almost everything for better visual understanding.
hope you find it helpfull and elaborative.
1. Electricity and magnetism are branches of physics that deal with charges in motion and observations relating to electricity and magnetism respectively.
2. A magnet is a body that attracts small pieces of iron and points toward the north-south direction when suspended freely. It has a north pole and a south pole. Like poles repel each other, while unlike poles attract.
3. Electromagnetism is produced when an electric current passes through a coil surrounding a magnetic material like iron. Electromagnets have many applications and their strength depends on factors like the current and number of turns in the coil.
1. Magnets can be natural or artificial. Natural magnets are made of the mineral magnetite while artificial magnets are usually made of steel or iron alloys.
2. All magnets have two poles - a North pole and a South pole. The magnetic force is strongest at these poles. A basic law of magnetism is that like poles repel each other while unlike poles attract.
3. Electromagnets are magnets that are temporarily magnetized by running an electric current through a coil of wire wrapped around an iron core. They are used in many electrical devices such as electric bells, telephones, loudspeakers, and industrial lifting magnets.
This document provides information about magnetism and electromagnetism. It discusses the poles of magnets, magnetic materials like iron, induced magnetism through magnetic induction, and how electromagnets can be created using coils of wire and electric current. Examples of applications that use electromagnets are also described, such as electric bells and circuit breakers. Magnetic fields and field lines are explained, including how they are produced by currents and plotted using compasses.
Magnets have north and south poles and magnetic fields that emerge from the north pole and return through the south pole. Molecular theory states that magnetism arises from electron orbits within molecules acting as tiny molecular magnets that are aligned in magnetized materials. An electric current flowing through a wire produces a circular magnetic field around it according to the right-hand rule. A coil of wire with current induces a magnetic field within it with field lines parallel to its axis. Electromagnets use this principle, with a solenoid wrapped around an iron core that becomes magnetized when current flows through the coil.
Magnets have north and south poles and magnetic fields created by electron arrangement. Molecular theory explains magnetism at the atomic level, with molecular magnets aligning in materials. Electric currents create magnetic fields, demonstrated by patterns with iron filings. Electromagnets are coils that can be magnetized and demagnetized by switching current on and off. Moving coil meters like the milliammeter measure current through magnetic interactions between the coil and a permanent magnet.
1. When an electric current passes through a conductor, it produces a magnetic field around the conductor.
2. An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current through a coil. The strength of the magnetic field can be increased by using an iron core inside the coil.
3. Electric bells use an electromagnet with a soft iron core. When the button is pressed, current flows through the electromagnet's coil, magnetizing the core and attracting an armature which strikes a bell to produce sound. Releasing the button stops current flow and resets the system.
The document discusses various topics related to magnetism including:
- The ancient discovery of magnetism in lodestone by the Chinese in 2000 BC who used it for navigation.
- The properties of magnets including having magnetic fields with poles that attract or repel other magnets and magnetic materials.
- Induced magnetism caused by an external magnetic influence.
- Differences between magnetic, non-magnetic, and magnetized materials and how to test for magnetism.
- Electrical and physical methods of magnetization and demagnetization.
- Plotting magnetic field lines using a compass to map field patterns.
Het this is Vedika Agrawal
the topic covers magnetism keeping in mind students of physiotherapy for there subject elecrotherapy.
Well it covers magnet of class 10th and 12th and also college level to some extent.
the ppt includes diagrams for almost everything for better visual understanding.
hope you find it helpfull and elaborative.
Ch-13-Magnetic-effect-of electric -current.pptxdeepakd621847
This document provides an overview of topics related to the magnetic effects of electric current. It will cover: 1) an introduction to magnetic effects, 2) properties of magnets and magnetic fields, 3) the magnetic field created by a circular current-carrying loop, 4) solenoids, 5) electromagnets, 6) the force on a current-carrying conductor in a magnetic field and Fleming's left-hand rule, 7) electric motors, 8) electromagnetic induction and Fleming's right-hand rule, 9) generators, 10) alternating and direct current, 11) domestic electric circuits, and 12) questions and answers from NCERT and board papers.
Ch-13-Magnetic-effect-of electric -current (2).pptxdeepakd621847
This document provides an overview of the topics to be covered regarding the magnetic effects of electric current. It will discuss: 1) the introduction to magnetic effects, 2) properties of magnets and magnetic fields, 3) magnetic fields created by current-carrying loops and solenoids, 4) electromagnets, 5) forces on conductors in magnetic fields and Fleming's Left Hand Rule, 6) electric motors, 7) electromagnetic induction and Fleming's Right Hand Rule, 8) generators, 9) AC and DC circuits, 10) domestic electric circuits, and 11) questions and answers. The introduction explains that an electric current produces a magnetic field around it, as demonstrated by a compass needle deflecting near a current-
The document discusses various topics related to magnetism and magnetic fields. It begins by defining a magnet and different types of magnets, including natural magnets and artificial magnets. It then discusses the poles of magnets, basic magnetic properties, and the relationship between magnetism and electricity. The document also covers magnetic fields, field lines, and how magnetic fields are produced by current-carrying conductors like coils and solenoids.
This document provides an introduction to the magnetic effects of electric current. It discusses:
1. Oersted's experiment in 1820 which established that electric current produces a magnetic field. When a current-carrying wire is placed near a magnetic compass needle, the needle deflects perpendicular to both the current and the needle.
2. Several rules for determining the direction of magnetic fields produced by currents, including Ampere's swimming rule, Maxwell's corkscrew rule, and the right hand thumb rule.
3. Key properties of magnets such as their attraction/repulsion behavior and the representation of magnetic field lines. Magnetic fields are produced not just by magnets but also by any moving electric charge
Magnetic Effects of Electric Current 10th PhysicsSHIVAM RANJAN
1. A magnet is a substance that produces a magnetic field and attracts other ferromagnetic materials like iron.
2. There are natural magnets found in nature, like lodestone, and artificial magnets can be created by rubbing an iron bar with a natural magnet.
3. A magnet has two poles - a north pole and a south pole. Opposite poles attract while like poles repel. Magnetic fields emerge from the north pole and enter through the south pole.
Magnetic effects can be produced by electric currents. When a current flows through a conductor, it creates a magnetic field around the conductor. Three key relationships govern magnetic fields: (1) like magnetic poles repel and opposite poles attract, (2) the strength of a magnetic field depends on the amount of current and number of turns in a coil, and (3) changing magnetic fields can induce electric currents in nearby conductors based on Lenz's law. Electromagnets and transformers take advantage of these relationships to manipulate magnetic fields for applications like motors, generators, and power transmission.
When a bar magnet is placed in iron filings, the filings arrange themselves in lines called magnetic field lines. These lines represent the magnetic field produced by the magnet and indicate the direction of the field from the south to north pole in closed curves. No two field lines cross. The strength of the magnetic field increases with increasing current in a wire. A solenoid, which is a coil of insulated copper wire wrapped into a cylinder shape, produces a strong magnetic field inside that can magnetize iron placed within it, creating an electromagnet.
1. A magnet is a substance that attracts iron and has north and south poles. Magnets have a magnetic field that emerges from the north pole and enters the south pole.
2. A current-carrying conductor has a magnetic field around it that forms concentric circles. The direction of the magnetic field is given by the right hand rule.
3. When the direction of current changes in a coil of wire, it induces a current in a nearby coil due to electromagnetic induction. The direction of induced current follows Fleming's right hand rule.
- Testing a magnet involves bringing each end of a specimen near the north pole of a bar magnet. Attraction indicates a magnetic material, while repulsion indicates a permanent magnet.
- Induced magnetism occurs when an unmagnetized magnetic material like iron becomes magnetized upon contact with a permanent magnet. However, induced magnets only maintain magnetism temporarily.
- The magnetic field is the region around a magnet where other magnetic objects experience a force. Magnetic field lines are used to represent the pattern and direction of this field.
Electricity and Magnetism विद्युत व चुंबकीय परिणाम.pptxSushant Dhekale
1. A magnet is a substance that attracts iron and has north and south poles. It creates a magnetic field around it with field lines emerging from the north pole and entering the south pole.
2. A current-carrying conductor also creates a magnetic field around it, with concentric circular field lines. The direction of the field is given by the right hand rule.
3. When a conductor carrying a current is placed in a magnetic field, it experiences a force whose direction is given by Fleming's left hand rule. This force can be used to create electromagnets and electric motors.
The first known magnet was a naturally occurring lodestone ore. Lodestone attracts iron and orients itself north-south when suspended. Natural magnets are found in nature, while artificial magnets are made by rubbing iron with lodestone. A magnetic compass uses a magnetized pointer to indicate north-south direction based on Earth's magnetic field. Magnets have attractive and directive properties with north and south poles that attract and repel each other. Earth's magnetic field is evidenced by a compass needle's orientation and iron's magnetization underground.
This document provides an overview of basics of electrical engineering, specifically focusing on magnets and magnetism. It defines different types of magnets including permanent magnets, temporary magnets, and electromagnets. It describes magnetic domains, magnetic dipoles, magnetic fields, flux, and various laws of magnetism including Biot-Savart law, Ampere's law, force law, and Faraday's law. It also discusses applications such as solenoids, transformers, and generators.
SOME BASIC PRINCIPLES OF MAGNETISM (Autosaved).docxZocelynManingo1
Electric Current and Magnetism
The Nature of Magnetism: Electricity’s Silent Partner
Magnetism is a property of a material that enables to attract or repel other materials. The presence and strength of the material’s magnetic properties can be observed by the effect of the forces of attraction and repulsion on other materials.
What makes magnets?
Magnets are actually created by tiny spinning electrons in an atom. The electrons move about the nucleus and spin like a top, creating a tiny magnetic field.
If electrons are spinning in the same direction there is more magnetism, while electrons spinning in opposite directions cancel out each others’ magnetic fields. Magnetic fields are invisible, we can only see the effects of the magnetic force.
Magnetic Field: The space around a magnet in which a magnetic force is exerted
— The shape of a magnetic field is revealed by magnetic field lines
Directed away from north poles and toward south poles
Magnets have two ends or poles, called north and south poles. At the poles of a magnet, the magnetic field lines are closer together.
The magnetic field lines around horse-shoe and disk magnets are closest together at the magnets’ poles. Unlike poles of magnets attract each other and like poles of magnets repel. Magnetic Poles: A region on a magnet which produces magnetic forces
The poles of a suspended magnet will align themselves to the poles of the Earth
Fundamental Rule: Like poles repel; opposite poles attract
If a force of attraction only is possible between an object and a magnet, then the object interacting with the magnet contains a ferromagnetic substance and is considered naturally magnetic.
If a force of repulsion is only between an object and a magnet, then the object interacting with the magnet may also be a permanent magnet or a temporarily magnetized ferromagnetic material.
Materials which are attracted by a magnet are known as magnetic materials. Iron, cobalt, nickel and many alloys of these metals like steel and alnico are magnetic.
Magnetic materials can be used to make permanent or temporary magnets unlike the non-magnetic materials which cannot.
INDUCED MAGNETISM
The process by which the screws become magnets is called Electric/Magnetic Induction. This same process is the reason why magnets attract non-magnetized magnetic substances such as the screw. The screw becomes an induced magnet with the end nearer the magnet having an opposite polarity to that of the permanent magnet. Hence attraction happens after magnetic induction occurs. The quicker way to know the polarity of a permanent or induced magnet is by the use of a magnetic compass. Compass needle is a small magnet that is free to pivot in a horizontal plane about an axis and that the end of the magnet that points to geographic north is called the north (N) pole. Likewise, the opposite end of the magnet is the south (S) pole.What are magnetic domains?
Magnetic substances like iron, cobalt and nickel
1. The document discusses magnetic properties including field lines and how current carrying conductors and coils produce magnetic fields according to rules like the right hand thumb rule.
2. It also explains how solenoids and closed coils can behave like bar magnets when current flows, and how Fleming's left hand rule describes the force on a current carrying conductor in a magnetic field.
3. Finally, it covers electromagnetic induction, generators, domestic electric circuits, and applications like motors and power generation.
Magnetic Effects of Electric Current for Grade 10th StudentsMurari Parashar
In this chapter, we will study the effects of electric current : Moving charges or electric current generates a magnetic field. This is useful to CBSE Students.
A compass needle is placed under a copper wire carrying an electric current. When current is passed through the wire, the compass needle deflects, showing that the current produces a magnetic field that exerts a force on the compass needle. This demonstrates that electricity and magnetism are linked. The magnetic field produced by a current has concentric circular field lines around the wire. Increasing the current increases the magnetic field strength.
MAGNETISM and ELECTROMAGNETISM 2012.pptxmarkgrant78
Outlines the electrical principles regarding magnetism and its relation to electromagnetism and also their key role in the function of other electrical devices and equipment.
This document provides information about electromagnetism and various electromagnetic concepts and devices. It begins by defining electromagnetism as the fundamental force consisting of electricity and magnetism. It then discusses magnetic fields, including how they are represented by field lines. It describes how electromagnets are devices that produce magnetic fields when electricity is applied. It discusses various electromagnetic concepts like Ampere's law and how changing electric and magnetic fields interact. It provides examples of electromagnetic devices like motors, generators, and relays. It describes applications of electromagnetism in devices commonly found in homes and schools.
This document discusses magnetism and magnetic fields. It describes testing magnets by bringing specimens near magnet poles to observe attraction or repulsion. Induced magnetism is explained as magnetizing an unmagnetized material by bringing it near a permanent magnet. Methods of magnetization like stroking or using an electric current can create permanent magnets from steel. Demagnetization methods like heating, hammering, or alternating current remove magnetism. Magnetic field lines are plotted experimentally using a compass to represent the direction and strength of magnetic fields, which differ for configurations like single or paired magnets.
Ch-13-Magnetic-effect-of electric -current.pptxdeepakd621847
This document provides an overview of topics related to the magnetic effects of electric current. It will cover: 1) an introduction to magnetic effects, 2) properties of magnets and magnetic fields, 3) the magnetic field created by a circular current-carrying loop, 4) solenoids, 5) electromagnets, 6) the force on a current-carrying conductor in a magnetic field and Fleming's left-hand rule, 7) electric motors, 8) electromagnetic induction and Fleming's right-hand rule, 9) generators, 10) alternating and direct current, 11) domestic electric circuits, and 12) questions and answers from NCERT and board papers.
Ch-13-Magnetic-effect-of electric -current (2).pptxdeepakd621847
This document provides an overview of the topics to be covered regarding the magnetic effects of electric current. It will discuss: 1) the introduction to magnetic effects, 2) properties of magnets and magnetic fields, 3) magnetic fields created by current-carrying loops and solenoids, 4) electromagnets, 5) forces on conductors in magnetic fields and Fleming's Left Hand Rule, 6) electric motors, 7) electromagnetic induction and Fleming's Right Hand Rule, 8) generators, 9) AC and DC circuits, 10) domestic electric circuits, and 11) questions and answers. The introduction explains that an electric current produces a magnetic field around it, as demonstrated by a compass needle deflecting near a current-
The document discusses various topics related to magnetism and magnetic fields. It begins by defining a magnet and different types of magnets, including natural magnets and artificial magnets. It then discusses the poles of magnets, basic magnetic properties, and the relationship between magnetism and electricity. The document also covers magnetic fields, field lines, and how magnetic fields are produced by current-carrying conductors like coils and solenoids.
This document provides an introduction to the magnetic effects of electric current. It discusses:
1. Oersted's experiment in 1820 which established that electric current produces a magnetic field. When a current-carrying wire is placed near a magnetic compass needle, the needle deflects perpendicular to both the current and the needle.
2. Several rules for determining the direction of magnetic fields produced by currents, including Ampere's swimming rule, Maxwell's corkscrew rule, and the right hand thumb rule.
3. Key properties of magnets such as their attraction/repulsion behavior and the representation of magnetic field lines. Magnetic fields are produced not just by magnets but also by any moving electric charge
Magnetic Effects of Electric Current 10th PhysicsSHIVAM RANJAN
1. A magnet is a substance that produces a magnetic field and attracts other ferromagnetic materials like iron.
2. There are natural magnets found in nature, like lodestone, and artificial magnets can be created by rubbing an iron bar with a natural magnet.
3. A magnet has two poles - a north pole and a south pole. Opposite poles attract while like poles repel. Magnetic fields emerge from the north pole and enter through the south pole.
Magnetic effects can be produced by electric currents. When a current flows through a conductor, it creates a magnetic field around the conductor. Three key relationships govern magnetic fields: (1) like magnetic poles repel and opposite poles attract, (2) the strength of a magnetic field depends on the amount of current and number of turns in a coil, and (3) changing magnetic fields can induce electric currents in nearby conductors based on Lenz's law. Electromagnets and transformers take advantage of these relationships to manipulate magnetic fields for applications like motors, generators, and power transmission.
When a bar magnet is placed in iron filings, the filings arrange themselves in lines called magnetic field lines. These lines represent the magnetic field produced by the magnet and indicate the direction of the field from the south to north pole in closed curves. No two field lines cross. The strength of the magnetic field increases with increasing current in a wire. A solenoid, which is a coil of insulated copper wire wrapped into a cylinder shape, produces a strong magnetic field inside that can magnetize iron placed within it, creating an electromagnet.
1. A magnet is a substance that attracts iron and has north and south poles. Magnets have a magnetic field that emerges from the north pole and enters the south pole.
2. A current-carrying conductor has a magnetic field around it that forms concentric circles. The direction of the magnetic field is given by the right hand rule.
3. When the direction of current changes in a coil of wire, it induces a current in a nearby coil due to electromagnetic induction. The direction of induced current follows Fleming's right hand rule.
- Testing a magnet involves bringing each end of a specimen near the north pole of a bar magnet. Attraction indicates a magnetic material, while repulsion indicates a permanent magnet.
- Induced magnetism occurs when an unmagnetized magnetic material like iron becomes magnetized upon contact with a permanent magnet. However, induced magnets only maintain magnetism temporarily.
- The magnetic field is the region around a magnet where other magnetic objects experience a force. Magnetic field lines are used to represent the pattern and direction of this field.
Electricity and Magnetism विद्युत व चुंबकीय परिणाम.pptxSushant Dhekale
1. A magnet is a substance that attracts iron and has north and south poles. It creates a magnetic field around it with field lines emerging from the north pole and entering the south pole.
2. A current-carrying conductor also creates a magnetic field around it, with concentric circular field lines. The direction of the field is given by the right hand rule.
3. When a conductor carrying a current is placed in a magnetic field, it experiences a force whose direction is given by Fleming's left hand rule. This force can be used to create electromagnets and electric motors.
The first known magnet was a naturally occurring lodestone ore. Lodestone attracts iron and orients itself north-south when suspended. Natural magnets are found in nature, while artificial magnets are made by rubbing iron with lodestone. A magnetic compass uses a magnetized pointer to indicate north-south direction based on Earth's magnetic field. Magnets have attractive and directive properties with north and south poles that attract and repel each other. Earth's magnetic field is evidenced by a compass needle's orientation and iron's magnetization underground.
This document provides an overview of basics of electrical engineering, specifically focusing on magnets and magnetism. It defines different types of magnets including permanent magnets, temporary magnets, and electromagnets. It describes magnetic domains, magnetic dipoles, magnetic fields, flux, and various laws of magnetism including Biot-Savart law, Ampere's law, force law, and Faraday's law. It also discusses applications such as solenoids, transformers, and generators.
SOME BASIC PRINCIPLES OF MAGNETISM (Autosaved).docxZocelynManingo1
Electric Current and Magnetism
The Nature of Magnetism: Electricity’s Silent Partner
Magnetism is a property of a material that enables to attract or repel other materials. The presence and strength of the material’s magnetic properties can be observed by the effect of the forces of attraction and repulsion on other materials.
What makes magnets?
Magnets are actually created by tiny spinning electrons in an atom. The electrons move about the nucleus and spin like a top, creating a tiny magnetic field.
If electrons are spinning in the same direction there is more magnetism, while electrons spinning in opposite directions cancel out each others’ magnetic fields. Magnetic fields are invisible, we can only see the effects of the magnetic force.
Magnetic Field: The space around a magnet in which a magnetic force is exerted
— The shape of a magnetic field is revealed by magnetic field lines
Directed away from north poles and toward south poles
Magnets have two ends or poles, called north and south poles. At the poles of a magnet, the magnetic field lines are closer together.
The magnetic field lines around horse-shoe and disk magnets are closest together at the magnets’ poles. Unlike poles of magnets attract each other and like poles of magnets repel. Magnetic Poles: A region on a magnet which produces magnetic forces
The poles of a suspended magnet will align themselves to the poles of the Earth
Fundamental Rule: Like poles repel; opposite poles attract
If a force of attraction only is possible between an object and a magnet, then the object interacting with the magnet contains a ferromagnetic substance and is considered naturally magnetic.
If a force of repulsion is only between an object and a magnet, then the object interacting with the magnet may also be a permanent magnet or a temporarily magnetized ferromagnetic material.
Materials which are attracted by a magnet are known as magnetic materials. Iron, cobalt, nickel and many alloys of these metals like steel and alnico are magnetic.
Magnetic materials can be used to make permanent or temporary magnets unlike the non-magnetic materials which cannot.
INDUCED MAGNETISM
The process by which the screws become magnets is called Electric/Magnetic Induction. This same process is the reason why magnets attract non-magnetized magnetic substances such as the screw. The screw becomes an induced magnet with the end nearer the magnet having an opposite polarity to that of the permanent magnet. Hence attraction happens after magnetic induction occurs. The quicker way to know the polarity of a permanent or induced magnet is by the use of a magnetic compass. Compass needle is a small magnet that is free to pivot in a horizontal plane about an axis and that the end of the magnet that points to geographic north is called the north (N) pole. Likewise, the opposite end of the magnet is the south (S) pole.What are magnetic domains?
Magnetic substances like iron, cobalt and nickel
1. The document discusses magnetic properties including field lines and how current carrying conductors and coils produce magnetic fields according to rules like the right hand thumb rule.
2. It also explains how solenoids and closed coils can behave like bar magnets when current flows, and how Fleming's left hand rule describes the force on a current carrying conductor in a magnetic field.
3. Finally, it covers electromagnetic induction, generators, domestic electric circuits, and applications like motors and power generation.
Magnetic Effects of Electric Current for Grade 10th StudentsMurari Parashar
In this chapter, we will study the effects of electric current : Moving charges or electric current generates a magnetic field. This is useful to CBSE Students.
A compass needle is placed under a copper wire carrying an electric current. When current is passed through the wire, the compass needle deflects, showing that the current produces a magnetic field that exerts a force on the compass needle. This demonstrates that electricity and magnetism are linked. The magnetic field produced by a current has concentric circular field lines around the wire. Increasing the current increases the magnetic field strength.
MAGNETISM and ELECTROMAGNETISM 2012.pptxmarkgrant78
Outlines the electrical principles regarding magnetism and its relation to electromagnetism and also their key role in the function of other electrical devices and equipment.
This document provides information about electromagnetism and various electromagnetic concepts and devices. It begins by defining electromagnetism as the fundamental force consisting of electricity and magnetism. It then discusses magnetic fields, including how they are represented by field lines. It describes how electromagnets are devices that produce magnetic fields when electricity is applied. It discusses various electromagnetic concepts like Ampere's law and how changing electric and magnetic fields interact. It provides examples of electromagnetic devices like motors, generators, and relays. It describes applications of electromagnetism in devices commonly found in homes and schools.
This document discusses magnetism and magnetic fields. It describes testing magnets by bringing specimens near magnet poles to observe attraction or repulsion. Induced magnetism is explained as magnetizing an unmagnetized material by bringing it near a permanent magnet. Methods of magnetization like stroking or using an electric current can create permanent magnets from steel. Demagnetization methods like heating, hammering, or alternating current remove magnetism. Magnetic field lines are plotted experimentally using a compass to represent the direction and strength of magnetic fields, which differ for configurations like single or paired magnets.
Similar to magnetism.pptx fghfdghdgfhdfgh dgh dfgh dfh (20)
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
The CBC machine is a common diagnostic tool used by doctors to measure a patient's red blood cell count, white blood cell count and platelet count. The machine uses a small sample of the patient's blood, which is then placed into special tubes and analyzed. The results of the analysis are then displayed on a screen for the doctor to review. The CBC machine is an important tool for diagnosing various conditions, such as anemia, infection and leukemia. It can also help to monitor a patient's response to treatment.
artificial intelligence and data science contents.pptxGauravCar
What is artificial intelligence? Artificial intelligence is the ability of a computer or computer-controlled robot to perform tasks that are commonly associated with the intellectual processes characteristic of humans, such as the ability to reason.
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CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
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Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
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Use PyCharm for remote debugging of WSL on a Windo cf5c162d672e4e58b4dde5d797...shadow0702a
This document serves as a comprehensive step-by-step guide on how to effectively use PyCharm for remote debugging of the Windows Subsystem for Linux (WSL) on a local Windows machine. It meticulously outlines several critical steps in the process, starting with the crucial task of enabling permissions, followed by the installation and configuration of WSL.
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.
There are two types of artificial magnets. Temporary and permanent magnets. Temporary
magnets or electromagnets: If a piece of magnetic material, say, soft iron is placed in a strong
magnetic field of a solenoid it becomes magnetised by induction. The soft iron itself becomes a
temporary magnet as long as the current continues to flow in the solenoid. As soon as the source
producing the magnetic field is removed, the soft iron piece will loose its magnetism. Permanent
magnets: If steel is substituted for soft iron in the same inducing field as in the previous case, due
to the residual magnetism, the steel will become a permanent magnet even after the magnetising
field is removed. This property of retention is termed retentivenes. Thus, permanent magnets are
made from steel, nickel, alnico, tungsten all of which have higher retentiveness.
Magnetism and magnets: Magnetism is a force field that acts on some materials and not
on other materials. Physical devices which possess this force are called magnets. Magnets
attract iron and steel, and when free to rotate, they will move to a fixed position relative to
the north pole. Classification of magnets Magnets are classified into two groups.
• Natural magnets • Artificial magnets Lodestone (an iron compound) is a natural magnet
which was discovered centuries ago.
4. The earth's magnetic field: Since the earth itself is a large spinning mass, it
too produces a magnetic field. The earth acts as though it has a bar magnet
extending through its centre, with one end near the north geographic pole
and the other end near the south geographic pole.
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5. Magnetic terms and properties of magnet
1.Magnetic fields: The force of magnetism is referred to as a magnetic field. This field
extends out from the magnet in all directions, as illustrated in Fig 1. In this figure, the
lines extending from the magnet represent the magnetic field. The space around a
magnet in which the influence of the magnet can be detected is called the magnetic
field.
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2.Magnetic lines: Magnetic lines of force (flux) are assumed to be continuous loops,
the flux lines continuing on through the magnet. They do not stop at the poles.
3.Magnetic axis: The imaginary line joining the two poles of a magnet are called the
magnetic axis. It is also known as the magnetic equator.
4.Magnetic neutral axis : The imaginary lines which are perpendicular to the magnetic
axis and pass through the centre of the magnet are called the magnetic neutral axis.
6. 5.Unit pole: A unit pole may be defined as that pole which, when placed one metre
apart from an equal and similar pole, repels it with a force of 10 newtons.
6.Properties of a magnet: The following are the properties of magnets.
7.Attractive property : A magnet has the property of attracting magnetic substances
(such as iron, nickel and cobalt) and its power of attraction is greatest at its poles.
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8.Directive property: If a magnet is freely suspended, its poles will always tend
to set themselves in the direction of north and south.
9.Induction property: A magnet has the property of producing magnetism in a
nearby magnetic substance by induction.
7. 10.Poles-existing property: A single pole can never exist in a magnet. If it is broken
into its molecules, each molecule will have two poles.
11.Demagnetising property: If a magnet is handled roughly by heating, hammering,
etc. it will lose its magnetism.
12.Property of strength: Every magnet has two poles. The two poles of a magnet have
equal pole strength.
13.Saturation property: If a magnet of higher strength is further subjected to
magnetization, it will never acquire more magnetization due to its being already
saturated.
14.Property of attraction and repulsion: Unlike poles (i.e. north and south) attract
each other, while like poles (north/north and south/south) repel each other
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8. Shapes of magnets: Magnets are available in various shapes, with the magnetism
concentrated at their ends known as poles. The common shapes are listed here.
– Bar magnet
– Horseshoe magnet
– Ring magnet
– Cylindrical type magnet
– Specially shaped magnets
Bar magnet Horseshoe magnet RING Magnet
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9. Methods of magnetizing: There are three principal methods of magnetizing a
material.
• Touch method
• By means of electric current
• Induction method.
Touch method: This method can be further divided into:
• single touch method
• double touch method
• divided touch method
Single touch method: In the single touch method, the steel bar to be magnetized is
rubbed with either of the poles of a magnet, keeping the other pole away from it.
Rubbing is done only in one direction
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10. Double touch method: In this method the steel bar to be magnetized is placed over
the two opposite pole ends of a magnet, and the rubbing magnets are placed together
over the centre of the bar with a small wooden piece in between
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Divided touch method: Here the two different poles of the rubbing magnets are placed
as in the previous case. They are then moved along the surface of the steel bar to the
opposite ends. The rubbing magnets are then lifted off the surface of the steel bar and
placed back in the centre of the bar.
11. By electric current: The bar to be magnetized is wound with an insulated copper wire,
and then a strong electric current (DC) from a battery is passed through the wire for
some time. The steel bar then becomes highly magnetized. If the bar is of soft iron,
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Induction method: This is a commercial method of
making permanent magnets. In this method a pole
charger is used which has a coil of many turns and an iron
core inside The direct current supply is fed to the coil
through a push-button switch.
The steel piece to be magnetized is placed on the iron core kept inside the
coil, and direct current is passed through the coil. The iron core now becomes a
powerful magnet, and thus the steel piece is magnetised by induction. The
magnetised piece is then removed after switching off the supply.
12. Principles and laws of electro magnetism
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Oersted's experiment: Oersted, a Danish scientist discovered in 1819, while giving a
demonstration lecture, that there is a close relationship between electricity and
magnetism. He observed that when a magnetic needle is placed under and parallel to a
conductor, and then the current switched on, the needle tends to deflect at right angles to
the wire. Suppose, a wire in which the current is to be passed, is arranged in the direction
north to south by placing the needle above the wire as in Fig 1a. Then the north pole of the
needle will be deflected to the west, nearly perpendicular to the wire. The deflection will
be to the east, as in Fig 1b by placing needle below the wire. When the direction of the
flow of current is reversed, the deflections of the needle will be in the opposite direction
13. Electromagnetism: On passing a current through a coil of wire, a magnetic field is set
up around the coil. If a soft iron bar is placed in the coil of wire carrying the current,
the iron bar becomes magnetized. This process is known as `electromagnetism'. The
soft iron bar remains as a magnet as long as the current is flowing in the circuit. It
loses its magnetism when the current is switched off from the coil.
Electromangetism in a wire (current-carrying conductor): A magnetic field is formed
around a conductor carrying current. The field is so arranged around the conductor as
to form a series of loops. (Fig 3) The direction of the magnetic field depends on the
direction of the current flow. A compass moved around the wire will align itself with
the flux lines.
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14. Electromagnetism in a coil: If a number of loops are wound in the same direction to
form a coil, more fields will add to make the flux lines through the coil even more
dense. The magnetic field through the coil becomes even stronger. The greater the
number of loops, the stronger the magnetic field becomes. If the coil is compressed
tightly, the fields would join even more to produce an even stronger electromagnet
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The magnetic core: The magnetic field of a coil can be made stronger still by keeping
an iron core inside the coil of wire. Since the soft iron is magnetic and has a low
reluctance, it allows more flux lines to be concentrated in it than it would in the air.
The greater the number of flux lines, the stronger the magnetic field
15. The magnetic circuits - self and mutually induced emfs
MagnetoMotive Force (MMF): The amount of flux density set up in the core is
dependent upon five factors - the current, number of turns, material of the magnetic
core, length of core and the cross-sectional area of the core. More current and the
more turns of wire we use, the greater will be the magnetising effect. We call this
product of the turns and current the magnetomotive force
Reluctance: In the magnetic circuit there is something analogous to
electrical resistance, and is called reluctance, (symbol S). The total
flux is inversely proportional to the reluctance and so if we denote
mmf by ampere turns
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MMF = NI ampere-turns
where mmf - is the magnetomotive force in ampere
turns
N - is the number of turns wrapped on the core
I - is the current in the coil, in amperes
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Magnetic field strength: This is also known sometimes as field intensity, magnetic intensity or
magnetic field, and is represented by the letter H. Its unit is ampere turns
Flux density (B): The total number of lines of force per square metre of the cross- sectional
area of the magnetic core is called flux density, and is represented by the symbol B. Its SI unit
(in the MKS system) is tesla (weber per metre square).
Permeability: The permeability of a magnetic material is defined as the ratio of flux created in
that material to the flux created in air, provided that mmf and dimensions of the magnetic
circuit remain the same. It's symbol is μ
Hysteresis: Consider the graphical relation between B and H for a magnetic material. Since μ =
B/H, the graphical relationship shows how the permeability of a material varies with the
magnetizing intensity H.
17. Comparison between magnetic and electric circuits
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